Defiler

From UTRPG

A defiler is an arcane spellcaster who frequently defiles.

Arcane spellcaster leeches plant energy. Some spellcasters, called preservers, take only the minimum amount required to power a spell. However, others, called defilers, drain far more energy, enjoying the pleasurable rush of vital energy flowing through them. This act is incredibly wasteful and kills plants in a certain area, often scarring the ground so nothing can grow there for years or even centuries. In addition, it causes pain to nearby creatures. While preservers can hide their energy-gathering, the plant destruction makes defiling too obvious for that. Sometimes preservers can pretend their powers are those of shamans or the Way.

Unfortunately, most beings on Athas are ignorant of arcane magic and cannot distinguish between the two types. Any preserver might be mistakenly referred to as a spellcaster. Civilians will either run to fetch the templars or attack. Templars are trained to recognize arcane magic on sight, and will kill any arcane spellcaster they see (other than sorcerer-kings and templar defilers, of course).

All arcane-using PCs who can use arcane daily powers have the option of using Arcane Defiling, a special power which allows them to reroll an arcane daily power's attack or damage roll, at the cost of inflicting pain on their allies. There are a variety of feats which can enhance defiling.

Arcane Defiling
You draw upon the vitality of nearby life to fuel your magic, heedless of the harm you cause to the land and your allies.
At-Will * Arcane, Necrotic
Free Action Personal
Trigger: You make an attack roll or a damage roll as part of an arcane daily attack power.
Effect: You can reroll the triggering roll but must use the second result. In addition, each ally (willing or unwilling) within 20 squares of you take necrotic damage equal to half his or her healing surge value. This damage ignores immunities and cannot be reduced in any way.
Special: You can use this effect once for any arcane daily attack power you use, affecting any single attack roll or the damage roll for that power.